Search found 4828 matches

by Jirka
Mon Jan 27, 2020 6:15 pm
Forum: HYDRUS (2D/3D)
Topic: solute transport BC
Replies: 3
Views: 272

Re: solute transport BC

It's irrelevant in such case. J.
by Jirka
Tue Jan 21, 2020 6:55 pm
Forum: Hydrus 1D
Topic: Inverse modeling of HYDRUS-1D.
Replies: 5
Views: 344

Re: Inverse modeling of HYDRUS-1D.

here is the entire routine. Figure it out. I do not have time for that any more. J. ************************************************************************* subroutine Weight(HO,FO,WT,iType,iPos,NOBb,NOB,NOB1,NOB2,iWeight, ! Type,iConcType,ierr) double precision FO(NOBb),WT(NOBb) dimension HO(NOBb)...
by Jirka
Tue Jan 21, 2020 4:40 pm
Forum: Hydrus 1D
Topic: Inverse modeling of HYDRUS-1D.
Replies: 5
Views: 344

Re: Inverse modeling of HYDRUS-1D.

The easiest way to explain is to give you the code (when the standard deviation is used): else if(iWeight.eq.2) then if(nQ.gt.0) QAve=QAve/nQ if(nH.gt.0) hAve=hAve/nh if(nTh.gt.0) ThAve=ThAve/nTh if(nV.gt.0) vAve=vAve/nV if(nC.gt.0) cAve=cAve/nC if(nK.gt.0) rKAve=rKAve/nK QSig2=0. hSig2=0. ThSig2=0....
by Jirka
Sun Jan 19, 2020 7:56 pm
Forum: Hydrus 1D
Topic: cBot input method(EC simulation)
Replies: 8
Views: 628

Re: cBot input method(EC simulation)

cBot should be directly the concentration of groundwater, without any adjustments and conversions. You need to have consistent units for all input concentrations, i.e., initial and boundary concentrations. In US, we usually express EC in dS/m. J.
by Jirka
Fri Jan 17, 2020 5:19 pm
Forum: Hydrus 1D
Topic: cBot input method(EC simulation)
Replies: 8
Views: 628

Re: cBot input method(EC simulation)

No problem. Good luck with the simulations. Jirka
by Jirka
Fri Jan 17, 2020 5:15 pm
Forum: Hydrus 1D
Topic: Error: initial water content condition is lower than Qr
Replies: 8
Views: 856

Re: Error: initial water content condition is lower than Qr

You are using a dual-porosity model and specify the saturated water content of the immobile (Ths_im) and mobile (Ths_m) domains equal to 0.806 and 0.428, respectively. That is obviously possible since then the porosity would be larger than 1 (Ths_im + Ths_m = 1.334). That's the first problem. Second...
by Jirka
Fri Jan 17, 2020 1:47 am
Forum: Hydrus 1D
Topic: cBot input method(EC simulation)
Replies: 8
Views: 628

Re: cBot input method(EC simulation)

That cannot be true. If you have at the bottom Variable Pressure Head and Concentration BC, the program will honor the bottom pressure head as well as the bottom concentration. J.
by Jirka
Thu Jan 16, 2020 9:44 pm
Forum: Hydrus 1D
Topic: cBot input method(EC simulation)
Replies: 8
Views: 628

Re: cBot input method(EC simulation)

That depends what bottom boundary condition you use. If you use the pressure head BC (i.e., you specify the position of groundwater table, then you should use the Dirichlet BC and groundwater EC for cBot. If you use a free drainage BC, then cBot is not used.
by Jirka
Thu Jan 16, 2020 12:01 am
Forum: Hydrus 1D
Topic: Error: initial water content condition is lower than Qr
Replies: 8
Views: 856

Re: Error: initial water content condition is lower than Qr

No problem. Also, I usually simply zip the project and post it; and I have not encountered any problems with that. J.
by Jirka
Wed Jan 15, 2020 11:30 pm
Forum: Hydrus 1D
Topic: Inverse modeling of HYDRUS-1D.
Replies: 5
Views: 344

Re: Inverse modeling of HYDRUS-1D.

It seems that you do all the right things. Obviously, since HYDRUS-1D uses a local gradient optimization method (and not a global optimization method), you could do some more comprehensive analysis. See, for example, some recent papers by Brunetti: Brunetti, G., J. Šimůnek, and P. Piro, A comprehens...
by Jirka
Wed Jan 15, 2020 11:19 pm
Forum: Hydrus 1D
Topic: Error: initial water content condition is lower than Qr
Replies: 8
Views: 856

Re: Error: initial water content condition is lower than Qr

This is not particularly useful. Can you just post the entire project (with the inverse file)? J.
by Jirka
Wed Jan 15, 2020 9:50 pm
Forum: Hydrus 1D
Topic: Net mass tracer flux moving downward
Replies: 1
Views: 247

Re: Net mass tracer flux moving downward

HYDRUS-1D prints solute fluxes for up to 4 observation nodes at the end of the Solute.out file. See Table 13.3. SOLUTE.OUT in the Manual (the last item in the table). J.
by Jirka
Wed Jan 15, 2020 4:11 am
Forum: Hydrus 1D
Topic: Error: initial water content condition is lower than Qr
Replies: 8
Views: 856

Re: Error: initial water content condition is lower than Qr

It would be good to see the project when this happens. For a uniform flow model, this is pretty straightforward, but for a dual-porosity model it is more complicated. J.
by Jirka
Tue Jan 14, 2020 2:56 pm
Forum: Hydrus 1D
Topic: Flux data in observation nodes
Replies: 6
Views: 4210

Re: Flux data in observation nodes

It is a standard version. You can select this option ("Print Fluxes (instead of Temp) for Observation Nodes") on the Print Information dialog window. J/
by Jirka
Sun Jan 12, 2020 11:09 pm
Forum: HYDRUS (2D/3D)
Topic: solute transport BC
Replies: 3
Views: 272

Re: solute transport BC

Use the Cauchy (third-type) BC at both ends. At the outflow BC, the Cauchy BC will automatically be transformed into the Neumann BC (as is explain in the manual). J.